This Drupal 7 module does one basic thing, it removes tabs from the Login / Create Account / Request Password pages. There is no configuration needed. A use case for this would be if you want a more elegant and streamlined interface for these pages and you want to link to the other pages.
In this case you would want your own
user-login.tpl.php etc... which takes some extra work. For more and greater control over tabs, you might want to check out the Tab Tamer Module. Note this module does not unset the tabs so the pages are still available providing you have not disabled front end user registration via the Drupal UI.
Furthermore, this module would be good for themers who want this function to be in versionable code and don't necessarily have access to the client's remote UI.